Observation by David Davies: Object of the month, Mayall II in M31

Uploaded by

David Davies

Observer

David Davies

Observed

2023 Sep 15 - 23:00

Uploaded

2023 Sep 17 - 14:14

Objects

The Andromeda Galaxy (M31)

Equipment

RC10 telescope
ASI071 camera
SW EQ8 mount

Exposure

10 x 180s, gain 90, offset 30

Location

Cambridge, UK

Target name

Mayall II in M31

Title

Object of the month, Mayall II in M31

About this image

This is the first light image from my new camera, an ASI071. The 071 replaces an ASI294 camera I owned. I was always impressed by the sensitivity of the 294 camera but was never comfortable with its rendering of HII regions; they came out rather orange-looking due to the quite strong response of the green channel of the Bayer matrix at the red end of the spectrum. The 071 camera, on the other hand, has a response closer to that which I get from my QSI mono camera, and although it is less sensitive than modern rear-illuminated Sony sensors, I prefer the colours it produces.

The object in question is the centre of the three star-like objects up and left of the centre. It is a globular cluster orbiting M31.

This is Callum's challenge to the deep sky section for September. Unfortunately, I managed to gather only a little data due to persistent clouds, but I am pleased with the result.

Files associated with this observation

Mayall_2-RGB_close_crop.jpg (261.3 kB)

Like this image

Jeremy Shears, Martin Lewis, Mattia Piccoli, Dr Paul Leyland, Callum Potter

Comments

Dr Paul Leyland, 2023 Sep 21 - 12:09 UTC

Mayall II always reminds me of Mickey Mouse's head.

David Davies

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